﻿function click(element) {
    var evt = document.createEvent('MouseEvents');
    evt.initMouseEvent("click", true /* canBubble */, true, document.defaultView, 1, 0 /* screenX */, 0 /* screenY */, 0 /* clientX */, 0 /* clientY */,
        0 /* ctrlKeyDown */, 0 /* altKeyDown */, 0 /* shiftKeyDown */, 0 /* metaKeyDown */, 0 /* button */, null);
    
    element.dispatchEvent(evt);
}

function change(node) {
    var evt = node.ownerDocument.createEvent("HTMLEvents");
    evt.initEvent("change", true, false);
    return node.dispatchEvent(evt);
}

function expectError(action, errorName, errorMessage) {
    /// <summary>Tells fireunit to expect an error from the provided action.</summary>
    /// <param name="action" type="Function">The code to execute.</param>
    /// <param name="errorName" type="String" optional="true">(Optional) The name of the error thrown.</param>
    /// <param name="errorMessage" type="String" optional="true">(Optional) The message of the error thrown.</param>
    
    var thrown = false;
    
    try {
        action();
        ok(false, "The specified action must throw an error.");
    }
    catch (e) {
        thrown = true;
        
        if (errorName && e.name) {
            equals(errorName, e.name, "The error names must match.");
        }
        
        if (errorMessage && e.message) {
            equals(errorMessage, e.message, "The error messages must match.");
        }
    }
}

String.prototype.escape = function() {
    return this.replace(/</g, "&lt;").replace(/>/g, "&gt;");
};

function _(selector) {
    /// <summary>Retrieves the class object for the specified contract ID.</summary>
    /// <param name="selector">The contract ID for which to retrieve a class object OR an interface ID to retrieve the XPCOM interface for.</param>
    /// <returns type="ComponentClass" />

    if (selector) {
        if (selector[0] === "@") {
            return new ComponentClass(selector);
        }
        else {
            return Components.interfaces[selector];
        }
    }

    throw new Error("The selector is required for the $() function.");
}

function ComponentClass(contractId) {
    /// <summary>Creates a new ComponentClass instance which facilitates access to common XPCOM functions.</summary>
    /// <param name="contractId" type="string">The contract ID for which to retrieve a class object.</param>

    this._componentClass = Components.classes[contractId];

    if (!this._componentClass) {
        var console = Components.classes["@mozilla.org/consoleservice;1"].getService(Components.interfaces.nsIConsoleService);
        console.logStringMessage("The contract ID '" + (contractId || "NULL") + "' did not yield a known component class.");
    }
}

ComponentClass.prototype = {
    instance: function (interfaceId) {
        /// <summary>Creates an instance of the component given an interface nsID for that component to conform to.</summary>
        /// <param name="interfaceId" type="string">The ID of the interface that is returned to represent a class instance.</param>
        /// <returns>An instance of a particular class given the specified interface ID.</returns>

        return this._componentClass.createInstance(Components.interfaces[interfaceId]);
    },

    service: function (interfaceId) {
        /// <summary>Gets a reference to a particular XPCOM service based on the nsID of an interface for that service to conform to.</summary>
        /// <param name="interfaceId" type="string">The ID of the interface that is returned to represent a service.</param>
        /// <returns>A reference to a particular XPCOM service.</returns>

        return this._componentClass.getService(Components.interfaces[interfaceId]);
    }
};

var Base64 = {
    // private property
    _keyStr: "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=",

    // public method for encoding
    encode: function (input) {
        var output = "";
        var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
        var i = 0;

        input = Base64._utf8_encode(input);

        while (i < input.length) {

            chr1 = input.charCodeAt(i++);
            chr2 = input.charCodeAt(i++);
            chr3 = input.charCodeAt(i++);

            enc1 = chr1 >> 2;
            enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
            enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
            enc4 = chr3 & 63;

            if (isNaN(chr2)) {
                enc3 = enc4 = 64;
            } else if (isNaN(chr3)) {
                enc4 = 64;
            }

            output = output +
                this._keyStr.charAt(enc1) + this._keyStr.charAt(enc2) +
                    this._keyStr.charAt(enc3) + this._keyStr.charAt(enc4);

        }

        return output;
    },

    // public method for decoding
    decode: function (input) {
        var output = "";
        var chr1, chr2, chr3;
        var enc1, enc2, enc3, enc4;
        var i = 0;

        input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");

        while (i < input.length) {

            enc1 = this._keyStr.indexOf(input.charAt(i++));
            enc2 = this._keyStr.indexOf(input.charAt(i++));
            enc3 = this._keyStr.indexOf(input.charAt(i++));
            enc4 = this._keyStr.indexOf(input.charAt(i++));

            chr1 = (enc1 << 2) | (enc2 >> 4);
            chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
            chr3 = ((enc3 & 3) << 6) | enc4;

            output = output + String.fromCharCode(chr1);

            if (enc3 != 64) {
                output = output + String.fromCharCode(chr2);
            }
            if (enc4 != 64) {
                output = output + String.fromCharCode(chr3);
            }

        }

        output = Base64._utf8_decode(output);

        return output;

    },

    // private method for UTF-8 encoding
    _utf8_encode: function (string) {
        string = string.replace(/\r\n/g, "\n");
        var utftext = "";

        for (var n = 0; n < string.length; n++) {

            var c = string.charCodeAt(n);

            if (c < 128) {
                utftext += String.fromCharCode(c);
            } else if ((c > 127) && (c < 2048)) {
                utftext += String.fromCharCode((c >> 6) | 192);
                utftext += String.fromCharCode((c & 63) | 128);
            } else {
                utftext += String.fromCharCode((c >> 12) | 224);
                utftext += String.fromCharCode(((c >> 6) & 63) | 128);
                utftext += String.fromCharCode((c & 63) | 128);
            }

        }

        return utftext;
    },

    // private method for UTF-8 decoding
    _utf8_decode: function (utftext) {
        var string = "";
        var i = 0;
        var c = c1 = c2 = 0;

        while (i < utftext.length) {

            c = utftext.charCodeAt(i);

            if (c < 128) {
                string += String.fromCharCode(c);
                i++;
            } else if ((c > 191) && (c < 224)) {
                c2 = utftext.charCodeAt(i + 1);
                string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
                i += 2;
            } else {
                c2 = utftext.charCodeAt(i + 1);
                c3 = utftext.charCodeAt(i + 2);
                string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
                i += 3;
            }

        }

        return string;
    }
};